17
NET-A
G
ND
NET-
B
NETWO
R
K
UNIT "3"
NET-A
G
ND
NET-
B
NETWO
R
K
UNIT "4"
NET-A
G
ND
NET-
B
NETWO
R
K
MA
S
TE
R
UNIT "1"
NET-A
G
ND
NET-
B
NETWO
R
K
UNIT "2"
ACCE
SS
CONT
R
OL HOME
R
UN NETWO
R
K
U
S
ING ONE UNIT A
S
A NETWO
R
K MA
S
TE
R
NOTE
:
GROUND
CABLE SHIELDS
ONLY AT ONE END
S
HIELD
S
HIELD
S
HIELD
NET-A
G
ND
NET-
B
NETWO
R
K
UNIT "3"
NET-A
G
ND
NET-
B
NETWO
R
K
UNIT "4"
NET-A
G
ND
NET-
B
NETWO
R
K
MA
S
TE
R
UNIT "1"
NET-A
G
ND
NET-
B
NETWO
R
K
UNIT "2"
ACCE
SS
CONT
R
OL
NETWO
R
K U
S
ING
"DAI
S
Y CHAIN"
WI
R
ING
S
HI
EL
D
S
HI
EL
D
S
HIELD
NOTE
:
GROUND
CABLE SHIELDS
ONLY AT ONE END
Optional Network Connections (Continued)
RS-485 Network Wiring
Network wiring conforms to 3-wire RS-485 electrical specifi cations. Units
connected in the network can be wired using one unit as a “hub” or by
wiring from one unit to the next in “daisy-chain” fashion. See the fi gures
for wiring options.
• Use Belden 9925 or Carol C0600 shielded cable or equivalent.
Maximum wire run distance is 4000 feet.
✦
NOTE:
B
e sure to connect the cable’s shield to one of the
G
ND
terminals.
Network Wiring with Hub
1. Mount and install the units for the network.
2. Choose one unit to be the Network Hub. Usually this would be a
centrally located or “master” unit.
3. Route 3-conductor shielded cable from the hub unit to one of the
other units. Repeat this step to connect the hub unit to each of the
other units.
4. Connect the 3-conductor cable to each unit’s
NETWORK
terminals.
Network “Daisy-chain” Wiring
1. Mount and install the units for the network.
2. Route 3-conductor shielded cable from one unit to the next unit
until there is cabling run to all of the units.
3. Connect the 3-conductor cable to each unit’s
NETWORK
terminals.
